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2 Shets-Sheet 1.

(No Model.) I v W. S. OORWIN HOTEL AND BURGLAR ALARM ELEGTRIG ANNUNGIATOR.

I Patented Nov. 2'7; 1883'.

INVENTOR 4a/wW- ATTORNEY$ II IlIl/ll I'Illll (No Model.) 2 Sheets-Sheet 2. W. S.,GORWIN HOTEL AND BURGLAR ALARM ELEGTRIG ANNUNOIATOR.

Patented Nov. 27, 1883.

INVENTOR ATTORNEYS WITNES$ES= N, PETERS. Pha o-u inph r. waminpm n. c.

. UNITED STATES a'rnnr Fries.

WILLIAM s. CORWIN, or NEWARK, NEW JERSEY.

HOTEL AND BURGLAR ALAR M ELECTRIC ANNUNCIATQR.

SPECIFICATION forming part of Letters Patent No. 289,238, dated November 27, 1883,

A pplioation filed Aug To all whom, it may concern Be it known that 1, WILLIAM S. Conwnv, of Newark, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Hotel and Burglar Alarm Electric Annunciators, of which the following 'is a full, clear, and exact description.

Reference 'is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1, Sheet 1, is a front elevation of my improvement, parts being broken away. Fig. 2, Sheet 1, is a sectional side elevation of the same, showing a drop displayed. Fig. 3, Sheet 1, represents a part of Fig. 2, showing the drop raised. Fig. 4, Sheet 2, is a plan view of the same, part being broken away, and the casing being shown in section. Fig. 5, Sheet 2, is a diagram illustrating the electric connections.

The object of this invention is to promote reliability in the operation of hotel and burglar alarm electric annunciators, and convenience in adjusting and resetting such annunciators.

The invention consists in an electric annun ciator constructed with a crank-shaft provided with fingers, whereby all the down-drops can be raised at one operation. The crank-shaft is also provided with a spring and stop -'pin, whereby it will be automatically brought back to and stopped in its proper position. The armatures are made with central ribs to receive the wear, and shoulders to support the drops when set, to reduce the friction and wear between the drops and armatures. The electric connections are so arranged that the electric current can be directed to cause a continuous ringing of the bell, to test the Working of the bell apparatus without affecting the magnets and drops, and to test the working of the drops and armatures without ringing the bell, as will be hereinafter fully described.

A represents the wooden base-plate of the annunciator, B is the switch-plate, and C is the casing.

D are electro-magnets, any desired number of which can be used, and which are attached to the upper arms of angular bars or supports E. The lower arms of the supports E are slotust 29, 1883. (No model.)

! A, so that by loosening the bolts F the magnets D can be adjusted close to or farther from the armatures H, which are hinged at their lower ends to lugs I, formed upon the forward ends of the bars G. The armatures H are beveled upon the side parts of their forward sides, leaving a central rib for the end. of the drops tion, while leaving a sufficient amount of metal to prevent a too rapid wear. Upon the upper part of the rib of each armature H is formed a shoulder, K, to receive the end of the drop armature H are attached the inner ends of two spiral springs, L M. The outer end of the spring L is attached to the upper end of the support E. The outer end of the spring M is attached to a screw, N, so that its tension can be regulated by turning the said screw. The screw N passes through the plate 0, and has it can be locked in place, when adjusted, by turning down the said nut. plate 0 are bent downward, and are secured to the base A by screws or bolts; or the said plate 0 can be supported by end plates or posts secured to its ends and to the base A. The springs L M are designed to hold the armatures H erect and in such positions that they will be readily attracted by the magnets.

The drops J have eyes in their outer ends to receive the rod or shaft Q, which rocks in O, and has a crank, It, attached to one end, for convenience in operating it. To the shaft Q, between the eyes of each drop J, is secured, by a set screw, S, or other suitable means, a finger, T, which is curved into such a position that its free end will rest against the forward side of the drop J when the said drop hangs in a vertical position. With this construcof a revolution, all the drops J, or so many of them as may be down, will be raised into a horizontal position, their free ends striking against the ribs of the armatures H and pusharmatures are withdrawn by the passage of a current of electricity through the said mag- J to strike against, so as to diminish the fric- J when raised or set. To the upper end of each a nut, P, screwed upon its npperend, so that The ends of the bearings in the vertical end parts of the plate tion, by turning the shaft Q, through a quarter ing back the said armatures H until the said ends have passed the shoulders K, by which they will be caught and held until the said nets. When the crank R is released, the shaft Q is turned back to its former position by a spiral spring, U, connected at one end with the said shaft, and at its other end with the casing O or other support for the said shaft. The backward revolution of the shaft Q is stopped when the fingers T come into proper position to receive and serve as stops for the drops J, when allowed to fall, by a stop-pin, V, attached to the casing O, and against which the crank Rstrikes. The drops are designed to have tickets attached to them, to indicate from what place the signal comes, either by covering the said drops with thin sheet metal cut away in front to display the tickets, and cut away at the lower edge to allow the edge of the drops to come in contact with the ribs of the armature, or by any other convenient means.

The plate 0 is made of a conducting material, and to its inner part, a little in front of each armature H, is attached the base of a spring, W, also made of a conducting material, and which is insulated from the plate 0 by rubber or other suitable non-conducting material interposed between the said plate and the base of the spring. Beneath the forward ends of the springs W are placed headed pins X, which pass through holes in the plate 0, and which are prevented from dropping through the said holes by their heads coming in contact with the said plate 0. The springs WV must be insulated from the pins X. A convenient way of effecting this insulation is to cover the ends of the springs W with paper, and cement the said paper in place and cover and protect it by asphaltum, varnish, or other suitable means. When the drops J are raised or set, they come in contact with the lower ends of the pins X and raise the said pins, raising the free ends of the springs W away from the plate 0. When one or more drops J fall, the contact-points Y upon the lower sides of the springs W come in contact with the plate 0 and establish an electric connection between the said springs and plate. The plate 0 is connected with the switch Z by a wire, a. With the bases of the springs W is connected a wire, I), which is also connected with the contact-pointc of the switch d. The switch at is connected by a wire, c, with the bindingpost f, which is connected by a wire, 9, with the negative pole of the battery. The other contact-point, h, of the switch at is connected by the wires i i with the binding-post j, which is connected by a wire, k, connected with the bell-magnet Z, with the binding-post m, connected by a wire, n, with the positive pole of the battery.

The binding-post m is connected by a wire, 0, with the contact-point p of the switch Z. The other contact-point of the switch Z is connectcd by a wire, 1?, with the wires 2' t". The switch Z is connected by the wiresa qwith one end of the helices 1- of the magnets D. The other ends of the helices rare connected with the switches s, the contact-points of which are connected by wires t with the binding-posts a. Each of the bindingposts u is connected with a room, window, or other place from which a signal or alarm is to be sent by awire, 1), connected at said point with a ground-wire in the ordinary manner. Each helix 1' is wound upon a pasteboard spool, 10, which is slipped upon a soft-iron core, 11:, attached to the anglebar E, and the forward end of the said core has paper cemented to it, to keep the armature H from coming in direct contact with the said core, and being thus caused to adhere too firmly. WVith this eonstruction,when the drops J are set and the switches Z d are in the positions shown in Fig. 4, if the circuit is closed at the place whence a signal isto be sent, a current of electricity will pass from the battery through the bell-circuit 7r, sounding an alarm, through the wires 2' t the switch Z, the wires a q, one or more magnets D, one or more switches s, and the wires t v, to the point where 4 the circuit was closed, thence through the ground-wire to the ground, and back to the battery. The passage of this current of electricity causes the magnet D to attract the armature H, allowing the drop J to fall and the pin X to slide down, bringing the contactpointY into contact with the plate 0, and cansing the current of electricity to pass through the bell-circuit k, the wires t" 2' the switch Z, the wire a, the plate 0, the spring W, the wire I), the switch at, and the wires 6 5 back to the battery, causing a continuous sounding of the bell. When the switch at is placed upon the contact-point h, the current of electricity passes from the battery through the bell-circuit k, the wires 2" i, the switch d, and the wires 6 9, back to the battery. This arrangement allows the bell to betes'ted without working the armatures and drops. When the switch Z is upon the contact-point p, and one or more of the circuits through the wires 22 are closed, the current of electricity passes from the battery through the wires n 0, the switch Z, the wires a q, magnets D, the keys 8, the wires t 'v, and the ground,back to the battery, causing the drops J to fall, and allowing the drops to be tested without sounding the bell.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In an electric annuneiator, the combina tion, with a crank-shaft and a series of drops fitted loosely thereon, of a series of fingers attached to the said shaft, and having their free ends resting against the drops when in a vertical position, substantially as herein shown and described.

2. In an electric annuneiator, the armature- H, made substantially as herein shown and described, with a central rib to receive the wear, and a shoulder, K, on said rib, to support the drop when set, whereby the friction and wear between the drop and armature will be reduced, as set forth.

3. In an electric annuneiator, the combination with the crank-shaft Q, provided with the fingers '1, of the drops J, having eyes in their outer ends to receive the said shaft the sprlngU, and the stop V, substantially as herein shown and described.

4. In an electric annunciator, the combination, with the conducting-wires 13, i and e, of

tially as herein shown and described, whereby the working of the bell apparatus can be tested without sending an electric current through the drop-magnets, as set forth. a

6. In an electric annunciator, the combination, with the battery-wire n and the switch Z, the conducting-wire a, the conducting-plate O, the conducting-springs W, the wire I), the switch d, and the wires 6 g, of the conductingwire 0 and. the contact-point p, substantially as herein shown and described, whereby the working of the drops and armatures can be tested without ringing the bell, as set forth. WVILLIAM S. OORWIN.

Witnesses:

JAMES T. GRAHAM, EDGAR TATE. 

